Comprehensive and Detailed Explanation:
When additional requirements are identified that may impact the project's scope, timeline, or budget, the first step is to document these gaps and discuss their implications with the project team. This collaborative approach ensures that all stakeholders are aware of the potential impacts and can make informed decisions on how to proceed.
From Salesforce's best practices:
"When additional requirements are discovered that will result in the project exceeding timeline and budget constraints, the first step is to document the gap in requirements and discuss the schedule and budget impact with the project team."
-Salesforce Trailblazer Community
This approach allows for a transparent assessment and facilitates the development of a plan to address the new requirements, which may include reprioritizing tasks, adjusting timelines, or negotiating additional resources.